Hyundai Motor Company

Kia Motors Corporation

Hyundai Motor Corporation

Jae Yeong Yoo

Jae Won Jung

Kyu Il Lee

Sung Gone Yoon

Seong Cheol Jeong

Kyung Won Suh

Sung Hwa Ok

Kyuil Lee

Seung Heon Lee

A method and a system for diagnosing a failure of a temperature sensor for a fuel cell are provided. The method includes calculating a heating value that is generated at a fuel cell stack during a predetermined diagnosis time and then calculating a temperature variation of the fuel cell stack from the calculated heating value. A failure of a temperature sensor configured to measure a temperature of the fuel cell stack is then detected based on the calculated temperature variation of the fuel cell stack.

Method and system for diagnosing failure of temperature sensor for fuel cell

A fuel cell system includes: a fuel cell stack; a sensor configured to sense a current and a voltage of the fuel cell stack; and a controller configured to acquire weight information based on a relationship between a usage time of a fuel cell and the current or voltage of the fuel cell stack and to determine a humidity state of the fuel cell stack based on the weight information, the current of the fuel cell stack and the voltage of the fuel cell stack.

Fuel cell system and method of controlling the same

A method for controlling a motor torque in an electric vehicle, includes the steps of: (a) determining a driving condition of the vehicle; (b) determining whether or not a predetermined limiting condition for a creep torque increase rate is satisfied when it is determined that the vehicle is decelerating in step (a); and (c) limiting the creep torque increase rate when the limiting condition for a creep torque increase rate is satisfied, and applying a creep torque of which the increase rate has been limited.

Method for controlling motor torque in electric vehicle

A power generation system and a power generation method for a fuel cell vehicle, the power generation system comprising a main line that sequentially and electrically connects a fuel cell, a high voltage DC-DC converter, and a high voltage battery; an external power consumption device connecting unit; and a controller that controls the fuel cell or the high voltage DC-DC converter by selecting a mode for supplying power to an external power consumption device by using only power generated by the fuel cell, a mode for supplying power to the external power consumption device by using only the high voltage battery, or a mode for operating the fuel cell or the high voltage DC-DC converter in a high efficiency output interval, according to power consumption of the external power consumption device.

Power generation system and power generation method for fuel cell vehicle

A shut down system of a fuel cell vehicle includes: a fuel cell configured to output a high voltage; a rechargeable high voltage battery; a bidirectional converter arranged between an output terminal of the fuel cell and the high voltage battery; a first relay arranged between the fuel cell and the bidirectional converter; and a controller configured to control a voltage of the bidirectional converter when the fuel cell vehicle stalls to reduce a voltage of the output terminal of the fuel cell and turn off the first relay when a voltage value of the output terminal of the fuel cell is below a preset voltage reference value.

Growing community of inventors

Yongin-si, South Korea

Jae Yeong Yoo